Gregger, I didn't check the resistance of the pickup coil, figured the pulse was a better check. I used an analog meter set to 10VAC, the pickup should send 2 signals per crankshaft revolution by the magnets set into the alternator rotor. The pulse is about .5 volt, meter should "bounce" a bit. After the engine stalled and I checked right away, no "bounce" on the meter. After I removed the pickup, I waved a magnet over the coil core, and again had pulse. This was about 1/2 hour after the engine stalled. Never did check the resistance, may try that in a pot of hot water to see what temp it opens up at.
